Manufacturing- chairs



EDWARD Q. SMITH, OFy CINCINNATI, OHIO.

MANUFACTURING- CHAIRS.

Specification of Letters Patent No. 15,530, dated August 12, 1856.

To all whom it may concern.'

` Be it known that I, EDWARD Q. SMITH, of the city of Cincinnati, in thecounty of Hamilton and State of Ohio, have invented a new and usefulMachine for Fitting Pillar- Tops to Chair-Backs by Means of aDovetail-Machine; and I do hereby declare that the following is a fulland exact description thereof, reference being had to the accompanyingdrawings, forming part of this specification, and to the figures ofreference marked thereon, similar figures referring to correspondingparts.

The common method of fitting the tops of chair pillars to theback-pieces, is cutting dove-tails in the back piece and making the topof the pillar of a corresponding shape, which work is ordinarilyvdone byhand, and a sample of which is represented in Figures D, E, and H.

19 represents the back of the chair and 20 the pillar. The 'drawingsfully illustrate the manner of connecting the two pieces, and whichrequires much labor to make good work.

My improvement consists in an arrangement of machinery for 'cutting adove-tail groove in the chair-top, also for forming the pillar-top tofit into said groove.

A specimen of the work is represented in Figs. E and I, the dove-tailbeing made of a semicircular form, as shown in the sectional view atFig. E.

To enable others skilled in the art to make and use my improvement, Iwill proceed to describe its construction and operation by referringdirect to the accompanying drawings.

Fig. A is a top view of the machine. Fig. B is a side elevation of themachine. Fig. O is a rear elevation of the same.

1, 1, represents the generalframe work of the machine, and is providedwith a shaft 2 that runs in suitable bearings and receives motion fromthe counter-shaft 18 as shown in Fig. B, by means of a belt which willpass around the pulleys 23 and 24. The shaft 2 is provided with acutter-head 3 and furnished with cutters 8 and 9 (two, four, more orless).

5 is a table made to slide on the rod 18 and guide piece 13.

6 represents an adjustable bar which can be moved transversely byloosening the bolts or set screws 25, in order to place the pillar 11 onthe table at the proper point so as to cut it the required shape to fitthe dovetail made in the back piece of the chair.

7 Vrepresents a clamp wheel and screw for holding the pillar 11, whilebeing operated upon by the cutters 8 and 9. Cutter 8 is used forfinishing the sides ofthe pillar top, and cutter 9 for finishing the endof the pillar. The table 5 is also capable of being elevated or lowered,by. means of the screw 26 passing through the sliding piece 13, therebymaking a change in the form of the pillar ends for a larger or smallersize. When the table 5 is furnished with a pillar 11 and clamped againstthe adjusting piece G, by the screweclamp 7 it is then moved up to thecutter head 3, and the pillar passes into the recess made in the cutterhead at which time the cutters 8 and 9 give it the required shape, afterwhich it is drawn out and another pillar replaced to undergo the sameoperation.

rIhe adjusting piece 6 serves to hold the pillar steady when the cuttersare operating upon it. If desired, there could be a thin strip of metalfitted to the table 5, and a pillar 11, placed on each side of it, andboth be cut at once, thus forming and finishing two pillars at one time.But it may be more economical to dress and finish one pillar at a timeonly. This method of connecting the pillars and back-piece of the chairtogether, results in a great saving, as one man can do with a machinewhat six or eight can accomplish in the same time by hand in theordinary method as shown in Figs. D, E, and H. y

The end of this machine will be provided with a vertical sliding tablefor the purpose of holding and guiding the chair backs for making thesemicircular dove tails in them with a properly formed cutting tool, 4t,attached to the rear end of shaft 2 as shown in the different drawings.

14 represents the sliding table attached to the vertical sliding piece15. The chairbacks are held by placing them against the upright piece28, attached to the table, and clamping them to the proper place withthe clamp screw 17. The chair back is then brought in contact with thecutting tool 4,

by elevating the table by means of the lever piece 6, for4 holding the,pillar 11 to its 16 and' quadrant pinion as represented in properrelative position to the cutter-head,

Fig. B'. or equivalent means for making the top of 27 is a Weight forcounter balancing the the pillar the desired form and size to fit 5table 14 and its attachments; d i thel dove-taili in the chair-back. j

What I claim as my improvement an. de-

sire to secure by Letters Patent, is#- `J` EDWARD Q SMITH' Thearrangement of the sliding table 5, in Witnesses: f

combination With'thecuttenhead' 3 and eut- L. W. SMITH,

10 ters 8 and 9, furnished with the adjusting CHARLES H. FOX.

